I honestly love the concept of buying and having things like the trees and ponds for example.
The only tree that you can get is the Christmas one. But it would be nice to have ones around yearly like the nexus trees and common graal trees. Same as the stumps. It would allow so much more variation to how you can customize your house. I simply love that concept
Another thing I wanna add which I don't think it would require a lot of scripting since it is already in-game kinda. Is a practice spar area. Just simply a big spar block that would allow you to spar another person where it is placed and when you win or lose you'll be warped under the spar block saying if you won or lost like dojo and whatnot. I'm sure there is a crap ton of people who'd buy this